how center-align header text in Twenty Eleven theme

hellow all..
i’ve spent few hours searching how to do this but I need help.

Please see my blog and advise me how to center the header text ‘will she love paris?’

I have managed to get rid of the ‘search box’ which is usually placed next to the header text by adding this to my childtheme.

#branding #searchform {
display:none;
}
#branding .only-search + #access div {
padding-right: 0px;
}

now how can I center the header text? TIA ??